Uploaded February 2020 | Updated September 2026, 3 weeks ago
In this video I build a DC Load that's controlled by a raspberry pi. I've built dc loads before, but this time I decided to up the goal to supporting 100w (it actually handled 200w) using three mosfets instead of one. I drive it with a DAC and read back the actual state using an ADC. The CPU board is a raspberry pi, and I have a VFD, encoder, and some buttons for control. It also has a web UI. For more electronics projects, see smbaker.com
In this video I build a DC Load that's controlled by a raspberry pi. I've built dc loads before, but this time I decided to up the goal to supporting 100w (it actually handled 200w) using three mosfets instead of one. I drive it with a DAC and read back the actual state using an ADC. The CPU board is a raspberry pi, and I have a VFD, encoder, and some buttons for control. It also has a web UI. For more electronics projects, see smbaker.com
![Raspberry Pi 4 Thermal Investigation [Part 2] Frequency cap, Throttling, & Real-world test](https://i.ytimg.com/vi/D5YuP0IDFKU/mqdefault.jpg "Raspberry Pi 4 Thermal Investigation [Part 2] Frequency cap, Throttling, & Real-world test
In this video I continue taking a look at the thermal properties of the raspberry pi 4. I spend some time looking into frequency capping in detail. I even take a heat gun to the pi to make it cap and throttle all the way down to 300 Mhz. Then I do some real world tests to see how much heat comes from youtube streaming to an HDMI monitor, copying data to/from the USB3 port, and compiling software in the background. Then I throw the same delta fan on it that I showed in the previous video and demonstrate that performance returns back to normal.")
